Abrasive product



Nov. 26, 1935 L.- K. HEINRICH ABRASIVE PRODUCT Filed July 2, 1934 fad? Q/dz Patented Nov. 1 935 mm omen L dwls m Heinrich, Chicago, Ill, assignor a one-half to Edmund 1:. Allen Gary, Ind. 1 Application July 2, 1934, Serial s. 133,319

- My invention relates toabrasive products involving particularly steel or other metal wool and the general object of the inventlonbeing to provide improved means for supporting such wool so that it may be more conveniently and efllciently applied for abrading purposes.

The prior art discloses the securing of the wool, by sewing or otherwise, to textile material such as cloth, or the riveting or stapling of the wool to 1'0 sheet metal or other metallic backings. However such backing arrangements are not efficient nor" economical.

v I have found that steel wool or other metal wool can beaccurately, uniformly, and economi- 15 cally secured to metal backingby welding, as for example by spot welding oreby seam or line welding, and that the resulting product facilitates the application of the wool for abradant or cleaning moses, and that there is less loss of wool, and

. that finer andmore accurate work can be accom-.

plished; v r v r In accordance with my invention the wool can be readily and uniformly secured by. welding to sheet metal-backings of different forms and of different gauges, or can be welded to perforatedsheet metalbackings or to metal backing in the form of wire mesh fabric or gauze. v By securing the wool by means of welding, the back of the supporting sheet. remains perfectly smooth so that the sheet may be readily applied for service in abrading machines as for example to the rollers .of floor abradlng achines. The product will be as flexible and as applicable as sandpaper orem'ery cloth and 'can be used with 35 equal facility in the same manner thatsandpaper or-emery paper or emery cloth is applied and used. Referring to the'drawin V Figure 1 is a plan view of a length of sheet metal to which steel wool is. shown applied by means of spot welding; v

Figure 2 is a section on plane Il-Ilof Figurel; v

453mm backing by line welding, with the welding lines extending diagonally;

Figure 4 shows the wool welded to'a backing in- 1 the form of perforated-sheetlmetal;

-5 shows the wool applied to a backing v in the form of wire mesh fabric or gauze I Figured shows ametal -'sheet with the wool welded thereto and with the sheet applied around theroller of.an abrading machinehand M Figure-7 is a section showing a normally heavy 55 layer of wool compressed to a thinner layer and shows thewool applied to a-sheet (01. -209) v v "with the superposed wool threads lightly. welded together so as to form wool cloth or felt. Referring toFigure 1 the wool'may be secured to a continuous band or ribbon Ill of sheet metal such as steel and of the desired gauge. The wool 5 I I is spread overthis sheet in a more or less 'ilufiy condition and to uniform depth and then the plate with thewool thereon is fed through a welde ing machine for spot welding as indicated at II, A the wool at the welding spot being compressed 10 against the backing sheet while the wool between welding spots remains more open and sep-. arated to form the abrading surface. The weld.- in'g spots may be arranged as desired'as to dis- 'tance apart and figure. Under proper electrical l5 manipulation the back of the sheet will remain smooth andthere will be little or no burring or 'burning;at the welding spots on the top face of the sheet so that the wool between spots may be worn down practically to the backing sheet without any loss of wool and without danger of scratching or man-ing the surface worked on.

In the arrangement of Figure 3 the welding is along lines l3 extending diagonally of the back ing strip Ill with the wool between the welding 2 lines arranged diagonally so that the abrading will resemble the operation of a file or rasp.

Figure 4 shows the wool applied to a perforated. sheet metal band-or sheet IS with the wool line welded thereto. I v a Figure 5 shows the wool applied on a backing in the form of wire mesh fabric or gauze fabric 16, and the wool may be secured by welding lines exten ng at right a band or sheet.

Figure6 showsametal sheet llwiththewool welded thereon and applied around a roller It for.

use in abrading machines as for example the well known floor abrading Thesheet inetal sheet with the wool welded thereto can be as readily appliedas sandpaper or abrasive cloth generally used on such abrading machines, as the back of the metalsheet is entirely smooth.

Fibre 7 shows the formation of clothor felt (from steel or other metal wool. A uniform layer of the woolof comparatively large deptliis com-4Q I pressed to form a thinner layer of the desired gauge and this thinner layer is f between the, terminals of a welding machi ,for just suifi i cient current flow to lightly weldthe superposed 5 I i threads inthe strip together and the welding may be spot welding orline welding. when thewool I or felt is thus welded, no backing is necessary. and the wool cloth or fabrib resulting from the welding can bex emcien'tly used for abrading or r :7 v

ngles transversely of the 35 cleaning purposes without a backing, or if desired; it could be tacked or otherwise secured to abacking, and could also be readily applied around the rollers of abrading machines, or could be applied as an abradingr facing to rotary discs.

Having described my invention, I claim lows: a

1. An ,abradant structure adapted for use on as folthe rollers of-floor abrading machines, said structure consisting of s flexiblemetal sheet having an upper surface, and a layer of steel wool in a fluffy condition laid flat on said surface, fibers of the woolbeing fused to the upper surface of said L sheet. 15

2. A flexible rasp-like abradant structure adapted for use on the rollers of floor abradingi machines, or the like. said structure'consistingof a flexible metal strip having an upper surface, and a layer of steel wool in a. flufly conditionlaid' flat on said surface and pressed at intervals along lines extending crosswise between the longitudinaledgesof saidstripflbersofsaidwooibeing fused together and to the upper surface of said persurface by fusing strands of the wool to the 10 upper'surface of the metal sheet in passing an electric current through "strands in electrical circuit connection with the sheet.

4. Aile'xible steel-wool felt or cloth for use on and without necessitating weaving or spinning of the fibers of said felt said steel wool felt consisting of an elongated pad of steel 'wool compressed and having fibers thereof fused together at frequent intervals. Y LUDWIGK'HEINRICH.

the rollers of floor abradingmachines or the like, 18" 

